Rosie never really thought Frank would act on it when they agreed
their relationship should be open to new people. The idea seemed to her
very beautiful: that love for one person should increase the possibility
of more love in their lives, not function as a safe barrier to the
complications of more emotion; that love between two people could laast
and grow regardless of who was having sex with whom, or who had a crush on
whom, or went on a date. In practice, they were happily monogamous and
comparatively uncomplicated.